Heat-indicator for journal-bearings.



A. H. KLING & C. E. FOERCH.

HEAT INDICATOR FOR JOURNAL BEARINGS.

APPLICATION FILED NOV. s, 1915.

1,1 96,701. Patented Aug. 29, 1916.

3 ---a 4 5 J/J v I 3mm 17 {7' 5 AJIKh'ng, C. Efierck UNITED STATES PATENT OFFICE.

ANDREW H. KLING AND CHARLES E. FOERCH, 0F CLINTON, CONNECTICUT.

HEAT-INDICATOR FOR JOURNAL-BEARINGS.

Application filed November 6, 1915.

To all whom it may concern Be it known that we, ANDREW H. KLING and CI-IAnLns E. FonRoH, citizens of the United States, residing at Clinton, in the county of Middlesex and State of Connectiout, have invented new and useful Improvements in Heat-Indicators for Journal-Bearings, of which the following is a specification.

This invention relates to thermostatic alarm devices by means of which an audible signal will be given when the temperature of the surrounding atmosphere in the vicinity of the device rises above a predetermined degree.

The primary object of the invention is to provide a thermostatic device that can be readily attached to the structure to be protected and the vital parts of-which can be readily gotten to for renewal.

Another object of the invention is the novel manner in which one of the electrodes of the device is mounted and allowed to assume an active position, when the temperature in its vicinity reaches a certain degree.

The invention consists in the features of construction, combination, and arrangement of parts, hereinafter fully described and claimed, reference being had to the accompanying drawings, in which:

Figure 1 is a longitudinal section through a portion of a wheel and its axle showing our device applied thereto, the device being shown in side elevation. Fig. 2 is a vertical section therethrough. Fig. 3 is a horizontal section. Fig. 1 is a detail view of a portion of the device. Fig. 5 is a plan view of, a

modified form. Fig. 6 is a cross section through Fig. 5.

Referring to the drawings and more particularly to the form of our device shown in Figs. 1 to 4, the numeral 1 designates a plug having a threaded extension 2 engaging the threaded bore 3 formed in the hub 4: of the wheel 5, shown mounted upon the usual axle 6. This plug l'is provided with a centrally arranged passage 7 circular in cross section. The bottom of the passage 7 has seated therein a ferrule of insulation 8 upon which seats a mica disk forming a foot bearing for the lower end of an electrode 9 secured to a rod 7" centrally arranged within the passage 7 and projecting through the Specification of Letters Patent.

sage, of the passage,

Patented Aug. 29, 1916.

Serial No. 60,087.

cap 10, the latter being threaded upon the upper end of the plug. Insulating the rod '7 from the cap 10 is a sleeve 11 and bearmg upon opposite sides of the sleeve is a collar 12 formed integral with the rod 7 and nuts 13 threaded upon the upper end of the rod and to which the usual electric wire is attached. The electrode 9 is made of springy material and so formed to have a looped portion 1 1 which tends to move the curved extremity 15 away from the position in which it is held by means of the solder 16 to a position to engage the wall of the passage 7 In practice, the rod 7 forms one terminal of the electric circuit while the plug 1, made of any suitable material forms the other terminal of the electric circuit. In view of this arrangement, it will be seen that as soon as the surrounding atmosphere reaches a certain degree, the solder will fuse for releasing the electrode so that the extremity 15 will engage the body of the plug for completing the circuit.

In the modified form of our invention, we have shown a disk 17 of porcelain or other suitable insulating material provided with three.upstanding posts 18, 19, and 20, the post 18 forming one terminal of an electric circuit while the post 20 forms the other terminal of the circuit. A resilient wire 21 has one extremity coiled around the post 20 and secured thereto and tends to move toward the post 18 when the solder 22 securing it to the post 19 fuses in the manner previously set forth.

Having described the invention, what is claimed is:

1. A thermostatic circuit closer comprising a plug provided with a cylindrical passage, a rod mounted in said passage but insulated from the walls of the passage, a spring electrode secured -to said rod and adapted to move into engagement with a wall of the passage, and a fusible element securing said spring electrode to the rod and spacing it from a wall of the passage.

2. A thermostatic circuit closer compris ing a plug provided with a cylindrical pasa disk of insulated sheet in the bottom a cap threaded on said plug, a cylindrical rod passing through the cap, a spring electrode secured to one extremity of the rod having an intermediate portion m mea t/o1 resting on the disk of insulation, and hav- In testimony whereof We aflix our signaing its remaining extremity arranged to intures in presence of two Witnesses.

gage the Wall of the passage and fusi 1e means for attaching the last mentioned ex- 5 tremity to the first mentioned extremity of the electrode for normally spacing the last Witnesses: mentioned extremity from the Wall of the ALBERT DUDLEY, passage. R. B. FIRELY. 

